They say you can put up to 3 layers on a roof but why as another poster
stated!

Tom
"Patch" wrote in message
news:1121638786.a77213c4d9b7064a83f77d21f52a9d83@t eranews...
The composition shingles on my 14 year old house need to be replaced. Is
it necessary to remove the old shingles first, or can the new ones be
installed over the old ones?


Thanks